It's been a while since last update to Exchange 2007 Mailbox Server Role Storage Requirements Calculator. The Exchange team blog has announced an updated calculator version 13.0:
- We have updated the log generation numbers per message profile to be in line with our updated guidance.
- In v11.8, we decided to list the database cache per mailbox in the Storage Requirements results section. However this lead to confusion because it was named "Memory Profile / Mailbox" which implied that you would only utilize the associated amount of memory with the message profile (i.e. 5MB with Heavy profile), however that is not always the case. For example, 1200 2GB Light message profile mailboxes only requires 5GB of RAM (1200 * 2MB + 2GB), however the design requires 13 databases, which with SP1 requires 6GB of RAM. ESE will utilize 4GB of that RAM for the cache. As a result, 4096MB / 1200